Could you check the liner notes and let me know if they have certain info on the following songs, specifically: Have these recordings been officially prior to this set? And what was the original recording date of these songs?
FWIW, I had this back in the day (before my brother stole and destroyed it), but I don’t recall the liner notes being especially helpful. All I have left now is the first CD of demos. Sigh.
The liner notes claim they were all previously unreleased. All four later showed up on the Loaded (Fully Loaded Edition) a couple of years later.
I have the box set, but I don’t have the answer to your question. I never read the notes very carefully.